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Determination of the helium-4 mass in a Penning trap

  • S. Brunner
  • T. Engel
  • A. Schmitt
  • G. Werth

Abstract:

We have measured the cyclotron frequencies of He+, H+2 and D+2 ions in a room temperature Penning trap. The resonances were detected destructively by a time-of-flight technique. The statistical uncertainty of the resonance frequencies was generally below 1 ppb. A detailed account of measures to minimize systematic frequency shift is presented. Using the accepted values for the proton and deuteron mass we obtain a value for the 4He mass: M(4He) = 4.0026032489(22) (0.5 ppb). It is in agreement with the accepted value.

PACS. 27.10.+h A? 5 – 32.10.Bi Atomic masses, mass spectra, abundances, and isotopes – 07.75.+h Mass spectrometers 

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Copyright information

© EDP Sciences, Springer-Verlag, Società Italiana di Fisica 2001

Authors and Affiliations

  • S. Brunner
    • 1
  • T. Engel
    • 1
  • A. Schmitt
    • 1
  • G. Werth
    • 1
  1. 1.Institut für Physik, Universität Mainz, 55099 Mainz, GermanyDE

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